jackson's tenure with michael brune, executive director of the sierra club, one of the oldest environmental groups in the country. and kenneth green, senior fellow on energy and natural resources for the fraser institute, a canadian based think tank. making brune, we start with you. a quick overview first. four years in as the obama administration -- has the obama administration achieved what you'd hoped for? >> four years in the obama administration has done a great job and they do have some unfinished business but when you look at doubling the vehicle efficiency in just four years, that's a remarkable achievement. taking the amount of mercury and arsenic and die i don't think serious bodily injurys and air toxics out of the atmosphere from coal-fired power plants, that's an amazing victory. when you add on top of that a rule that was just announced last month to limit the amount of soot coming from power plant facilities across the country, those are just three rules among dozens that have had a big impact on keeping our air clean, our water safe and starting to reduce green
